(NsTIHOTWORENIQ (B/s - (NpU[KIN(B, (NaLEKSANDR sERGEEWI^(B.s ((NpERMX (B:s (NpERM(B. (NKN(B. (NIZD(B-(NWO(B,s, 1987)
Keywords: (NrUSSKAQ PO\ZIQs